BEIRUT/THE HAGUE - Syria has submitted a "more specific" list of its chemical weapons to the global regulator overseeing the destruction of its stockpile after discrepancies were reported by inspectors on the ground, officials said.

Damascus agreed to give up its chemical arsenal after Washington threatened military action following the death of hundreds of Syrians in a sarin gas attack on the outskirts of Damascus during Syria's civil war last August. But Damascus is several weeks behind schedule in handing over its lethal toxins.

A diplomat said questions had been raised by member states at the Organisation for the Prohibition of Chemical Weapons (OPCW) about the details of its chemical arsenal submitted by President Bashar Assad's government last year.

The officials said the original list had been based on estimates, not exact amounts of toxic agents found in storage and production facilities across Syria.

The joint U.N./OPCW mission in Syria found "discrepancies between what they found, and what was on the original declaration", one diplomat told Reuters.